brake boosting a TT 350z.
08-03-2007, 07:33 AM
#322
Alberto, I wonder if the cruise control function (with your 3.3 FD) is really gear dependent or is it speed dependent? If you move into 6th early (at the same speed you got it to work in 5th) will it hold? What about 4th at the same speed (say 55 mph).
Just curious that you may be moving out of the nominal speed range that the cruise function thinks you are traveling at (which is limited to max 89 mph stock).
Just curious that you may be moving out of the nominal speed range that the cruise function thinks you are traveling at (which is limited to max 89 mph stock).
08-03-2007, 07:47 AM
#323
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After talking to SFLG35 it looks like the module just won't work with his AT. The Cipher showed that the module was doing exactly what it is supposed to do, but he is still having some weird CC issues and the module only works occasionally (may be stall converted related - not sure).
08-03-2007, 08:45 AM
#324
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alright
the module seems to be working just as it is supposed to, while viewing it with the cipher. does anyone know what the stock stall speed is for the stock torque convertor on the 5AT?
the night before last when i installed it, it was raining out so the tires would slip and i could do a standing burn out all the way to redline. last night and this am the roads were dry, and the tires would not slip. when the tires arent slipping the car will still only rev to 2500 and not go any higher. i would imagine this is the stall speed of the stock torque convertor. isnt that why people get high stall speed torque convetors in automatics?
last night my cc was all over the place sometimes it would work sometimes it wouldnt. sometimes it would work for a few tenths of a mile and then turn off and it could not be set again. then sometimes it would work for a few miles and then turn off. finally last night when i was leaving the meet, the cc work for a good 15 miles then i put my blinker on and it turned off. so i set it again and then put the blinker on and off it went. i was able to repeat this several times, very wierd. then late last night after coming home from being out, i tired to use the cc again and the set light just started flashing at me like jasons is doin to him. this am cc is still not working
the module seems to be working just as it is supposed to, while viewing it with the cipher. does anyone know what the stock stall speed is for the stock torque convertor on the 5AT?
the night before last when i installed it, it was raining out so the tires would slip and i could do a standing burn out all the way to redline. last night and this am the roads were dry, and the tires would not slip. when the tires arent slipping the car will still only rev to 2500 and not go any higher. i would imagine this is the stall speed of the stock torque convertor. isnt that why people get high stall speed torque convetors in automatics?
last night my cc was all over the place sometimes it would work sometimes it wouldnt. sometimes it would work for a few tenths of a mile and then turn off and it could not be set again. then sometimes it would work for a few miles and then turn off. finally last night when i was leaving the meet, the cc work for a good 15 miles then i put my blinker on and it turned off. so i set it again and then put the blinker on and off it went. i was able to repeat this several times, very wierd. then late last night after coming home from being out, i tired to use the cc again and the set light just started flashing at me like jasons is doin to him. this am cc is still not working
08-03-2007, 09:45 AM
#325
The 5AT has stock stall 2600-2900 rpms per the 2004 G35 coupe SM.
I wonder if just the module is faulty and is generating spurious pulses unintentionally? Maybe a passenger could watch Cipher while driving to see if the module goes off even when you don't hit the brake? With the cruise going off during signaling it sounds like some kind of electrical mix up (the pics look pretty clear) - maybe the module is powering on/off or has a bad ground????
I wonder if just the module is faulty and is generating spurious pulses unintentionally? Maybe a passenger could watch Cipher while driving to see if the module goes off even when you don't hit the brake? With the cruise going off during signaling it sounds like some kind of electrical mix up (the pics look pretty clear) - maybe the module is powering on/off or has a bad ground????
08-03-2007, 11:11 AM
#326
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i had a passenger (_jb) in the seat with me as it was his cipher and laptop. lol. we didnt see and extra pulses being generated while we were driving around the cruise would just turn off.
i have an 03 so would that stall be the same on my car? its seems like i can only get to around 2500 - 2600 rpm.
i doubt its a bad ground. its connected to pin 1 which is the better ground to use, and is soldered pretty well to it. i guess i can just ground it to the car, but if im goin to go through the trouble of that im just goin to take it out.
i have an 03 so would that stall be the same on my car? its seems like i can only get to around 2500 - 2600 rpm.
i doubt its a bad ground. its connected to pin 1 which is the better ground to use, and is soldered pretty well to it. i guess i can just ground it to the car, but if im goin to go through the trouble of that im just goin to take it out.
08-03-2007, 12:37 PM
#328
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As of last night there weren't any code in either the ECU or ABS computer on his car. Once the 'set' light started blinking there is a chance that there is now a code stored.
08-03-2007, 07:49 PM
#332
Originally Posted by athenG
You almost had me there 
Do you mind doing some brake boosting on first at low speed? I just need to know if this will actually preload the engine at 5-10MPH if possible
. Rear-Mount Turbo Suck when being turned off for a long time
All I need is about 2lbs of boost and the turbo is going to be ok after that.
Do you mind doing some brake boosting on first at low speed? I just need to know if this will actually preload the engine at 5-10MPH if possible . Rear-Mount Turbo Suck when being turned off for a long time All I need is about 2lbs of boost and the turbo is going to be ok after that.
RCDASH-CC doesnt work with 3.3FD's in 6th, it has something to do with the speed sensor not reading the correct rpm's @ a certain speed. It will engage and disengage after 2-3 seconds, this is normal. My CC works fine in 5th, before and after the brake boost module. Im going to Vegas tomorrow morning for 1 week, sorry guys no vids till then. I just took a friend for a ride to show him he liked it, I forgot my camera though. I'll check this thread when I return. 2003 6MT, CC and unit working good here
08-03-2007, 07:52 PM
#333
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Originally Posted by Alberto
Tried it tonight I got 11psi out of 13psi before I dropped the hammer at about 4000rpm's in 1st! Useless! Ive never shot to redline so fast
What do you mean, you did get to 11PSI before you hit 4Krpm? where you rolling at what speed?
08-03-2007, 07:59 PM
#335
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Originally Posted by Alberto
Started at 3000rpm's, but doing this in 1st is very hard, by the time I had hit 11psi, I was up around 4000rpm's and I let off the brake. So yes it is possible...
Yes, that is good enough for me. All I want is to get the Turbo spooling and I'm good. Can't wait to try this thing.
Thanks
Last edited by athenG; 08-03-2007 at 08:03 PM.
08-07-2007, 10:32 AM
#339
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Summary:
You can't brake boost a 350Z/G35 from the factory because the ECU does not allow the brake and throttle to be applied at the same time.
KPtechnologies ( http://www.KPtechnologies.com ) came up with a module that limits brake signals going to the ECU to ~1 second. With the module installed you can press the brake down and after the 1 second timeout period the ECU 'thinks' that the brake was released, thus allowing brake and throttle at the same time (because the ECU doesn't think the brake is being pushed).
It has worked well on several 6mt vehicles with no loss of functions. There is one person having problems with his 6mts cruise control. I'm not sure if his is installed correctly because I've never talked to him.
One of the modules that was sent out to be installed in a 5AT proved to not work. There is more going on with the 5ATs then the 6MTs. I have no idea why it doesn't work, and we most likely won't try to make it work. At the present time, the module is considered for 6MT vehicles only.
With this module installed you can build boost while driving the car at a controlled speed by applying the brakes while pushing on the throttle. This loads the motor up, which spins the turbos. When you release the brake you could be near full boost. Keep in mind, that while the brakes are being applied the wheels are STILL spinning, thus creating heat and eating up brake pads.
You can't brake boost a 350Z/G35 from the factory because the ECU does not allow the brake and throttle to be applied at the same time.
KPtechnologies ( http://www.KPtechnologies.com ) came up with a module that limits brake signals going to the ECU to ~1 second. With the module installed you can press the brake down and after the 1 second timeout period the ECU 'thinks' that the brake was released, thus allowing brake and throttle at the same time (because the ECU doesn't think the brake is being pushed).
It has worked well on several 6mt vehicles with no loss of functions. There is one person having problems with his 6mts cruise control. I'm not sure if his is installed correctly because I've never talked to him.
One of the modules that was sent out to be installed in a 5AT proved to not work. There is more going on with the 5ATs then the 6MTs. I have no idea why it doesn't work, and we most likely won't try to make it work. At the present time, the module is considered for 6MT vehicles only.
With this module installed you can build boost while driving the car at a controlled speed by applying the brakes while pushing on the throttle. This loads the motor up, which spins the turbos. When you release the brake you could be near full boost. Keep in mind, that while the brakes are being applied the wheels are STILL spinning, thus creating heat and eating up brake pads.